Bobbin support for weft magazines



Oct. 7, 1930. c. J. LINDEGREN 1,777,372

BOBBIN SUPPORT. FOR WEFT MAGAZINES Filed May 17, 1929 IIIIIIIII JM/E/VTUR CARL L/NDEE/PE/V ATTURNE Y5 Fatented Gate 7, 1939 earner ca OAR-L J. LINDEGREN. (PF PRQVIDENCE, RHODE ISLAND, ASSIGNOR TO GRGMPTON 8: KHOXVLES :SJGGLJ: 8221418, OF VIQECESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS 'IBOBBIN SUPFORT FGR WEFT MAGAZINES Application filed 17, 1929. Serial No. 363,841.

This invention relates to improvements in supports for bobbins awaiting transfer in welt replenishing looms and it is the general object of the invention to provide asupport formed of a wire coiled on itself and treated so as to present a substantially smooth and uninterrupted surface to the passage of thread thereover as the bobbin moved toward transfer position.

In the usual multicolor weft replenishing loom a plurality of stacks of bobbins are arranged in parallel relation and so-called cradles are employed to release bobbins from the stacks. The bobbins move down inclined l guides or supports to a common position from which they are moved into the depleted shut tle by means of a transferrer hammer, the supports yielding to permit discharge of the bobbin. When the supports are made of a closely wound coil spring it is found that the threads which extend from the bobbin to the thread holder are likely to be caught in the spaces between two successive coils of the spring and it is an important object of my present invention to coat the coils with a compound which will substantially fill these spaces in this way permitting the thread from the bobbin to slide uninterruptedly over the support as the bobbin moves toward transfer position.

It is a further object of my invention to coat a. coil spring bobbin support with a rubber compound and vulcanize the same to the coils of the spring, so that as the latter bends on its axis there will still be a continuous and smooth surface presented to the thread.

With these and other objects in view which will appear as the description proceeds, my

invention resides in the combination and arrangement of parts hereinafter described anc set forth in the claims.

In the accompanying drawings wherein I have shown two convenient forms of my invention,

59 cut invention,

as lacquer, and

F ig. 3 is a view similar to Fig. 2 but showing the modified form of the invention wherein certain coils of the spring support coated with vulcanized rubber.

Referring particularly to Fig. l I have shown a loomside 10 supporting a magazine frame 11 having pivoted thereto a transferrer arm 12. The magazine includes in its construction an inside plate 13 having a plurality of flanges 14 which define compartments 15 down which the bobbins may move toward transfer position. The rods16 also enter into the construction of the magazine, two of said rods being shown herein.

Secured to each tie rod is a holder 1? held in adjusted angular and longitudinal position with respect to the tie rod by means of a set screw 18. The lower end of the holder may be provided with a bore 19 and split at 20. A bolt 21 extends through a split portion of the holder and affords means for clamping in adjusted angular and longitudn nal position the previously referred to support 22. The latter is formed preferably of asingle piece of wire coiled on itself and havinga series of closely wound convolutions of substantially the same dizuncteig av pc of which ertendsthrough the bore ll. be bolt 20 serves to clamp said coils in position with respect to the holder 17.

That portion of the holder which supports the bobbin l) in transferposition may conical in form, as set forth in the dra the coils becoming progressively of i ameter. l find that the conical end is so what stiffer than the larger end of the port with the result that any flerure i to transfer is likely to deform he a. the spring at points remote from the conical end.

The matter thus far described forms no part of my present invention and in operation a bobbin B will be released from one or at the position shown in Fig. 1. the transferrer arm 12 will descend by mecnanism not shown but well understood and eiipel theiaobbin from the magazine and cause the same to enter a depleted shuttle S.

As previously stated I find that as thehobbin moves down the supports the weft end IV extending therefrom is likely to become entangled with the spring by being caught bee tween two successive coils. In order to prevent this I treat the support so that the spaces between successive coils are substantially filled. ii According to the preferred form of my present invention I dip the coni- -f cal end or the whole of the spring support in some such a compound as enamel or lacquer. WVhen this substance dries I find that all the objectionable spaces between the coils of the spring; are filled and as a result there pre- 21) cnted to the thread a continuous smooth surface shown at 40 in Fig. 2 which does not entangle the thread.

In the inoditied form of my invention I rubberize the conical end and certain of the :5 larger coils of the support and thereafter vul canize the rubber so that the coils are coated j With a surface of durable elasticsubstance which fills the spaces between the coils and presents a smooth continuous surface to the no thread, the rubberizing permittin; ilexure of the support without disruption of the surface along which the thread extends.

In Fig. 3 I have designated at 50 ajzone of the support which has obeen vulcanized.

" I IOmQthe foregoing it wili be seen that I have provided a very simple means for filling the spaces between successive coils of a spring bobbin sripportf the support being); coated either with a composition such as lacquer or enamcl or siinilarsubstance. In the modified form of the invention a portion of the spring is coated with vulcanized rubber which in addition to having the properties of the lac quer in fillipp up objectionable spaces also preserves eoiitinuitysof surface while the support is bending. 1th the vulcanized rubber coating the latter will have intern a]. ridges whichncloselyjit the spaces between the cons to prevent slipping of the coating off the ='-"""'support. p i 1,

, Having thus described my inventionit will be seen that changes and modifications may:

he made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limit ed to the details herein disclosed. but what I claim is: if 1 1. A bobbin support formed of a wire wound to present aseries of closely adjacent coils and haying a coating of material to substantially till the spaces between the coilsto present a continuous surface to a thread.

2. A bobbin support formed of a wire 5. wound to present a series of closely;adjacent coils and having a coating of lacquer-like 'lhereafter material substantially filling the spaces between the coils to present a continuous surface to a thread.

attired my signature.

CARL J. LINDEGREN.

1 c no 

